have any of you received your replacement grips from horizon hobby yet? I just got mine the other day and I noticed that they sent instructions on how to send back the old pair of blade grips. They even sent a pre paid ups packing slip so I can just drop it off at ups to send back for free. Is it necessary to send the old blade grips back to Horizon hobby, because I just assume fly my helicopter as it is until I have a problem with the old blade grips. Either that or replace the old grips with the new ones they sent and keep the old ones for a temporary back up. Have any of you sent your old blade grips back?